Description
Philly Cheesesteak Casserole takes the bold flavors of the classic sandwich—tender roast beef, sautéed peppers, onions, mushrooms, and gooey provolone—then transforms them into a cheesy, bread-free casserole. Low-carb, keto-friendly, and packed with protein, this one-pan comfort dish is as satisfying as it is easy.
Ingredients
-
1 large (150 g) green bell pepper
-
1 large (150 g) yellow bell pepper
-
1 large (150 g) red bell pepper
-
2 tbsp (28 g) salted butter
-
1 small onion, thinly sliced (about ½ cup / 75 g)
-
3 cloves garlic, minced
-
8 oz (225 g) cremini mushrooms, thinly sliced
-
1½ lb (680 g) deli-style roast beef, thinly sliced
-
6 slices provolone cheese (about 6 oz / 170 g)
-
1 cup (100 g) shredded mozzarella cheese
-
Salt and pepper, to taste
Instructions
-
Preheat oven to 350°F (175°C). Slice bell peppers into thin strips.
-
In a large oven-safe skillet, melt butter over medium-low heat. Add onion and garlic, sauté for about 7 minutes until softened.
-
Stir in mushrooms and bell peppers, cook for 10 minutes until softened.
-
Add roast beef, tossing to combine. Season with salt and pepper.
-
Layer provolone slices on top, then sprinkle mozzarella.
-
Bake for 15 minutes, then broil for 2–3 minutes until cheese is bubbly and golden.
-
Let rest slightly before serving.
Notes
Add crushed red pepper flakes or jalapeños for spice.
Swap roast beef with ground beef, steak, or shredded chicken.
No oven-safe skillet? Transfer to a casserole dish before baking.
Mix in cheddar or Monterey Jack for flavor variety.
Great for meal prep—reheats beautifully.
- Prep Time: 15 minutes
- Cook Time: 25 minutes
- Category: Dinner
- Method: One-pan / Bake
- Cuisine: American